George cooper



(No Model.)

. G. COOPER.

MACHINE FOR SEWING LOOPBD FABRICS.

310.433,76@ Patented Aug. 5, 1890.

Suva/who@ UNITED lSTATES PATENT Erice.-

GEORGE COOPER, OF BENNINGTON, VERMONT, ASSIGN OR OE ONE-HALF TO CHARLES COOPER,

OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 433,766, dated August 5, 1890. Application filed April 2, 1890. Serial No. $46,282, (No model.)

To aZZ whom, 1215 may concern.-

Beit known that I, GEORGE COOPER, a citizen of the United States, residing at Bennington, in the county of Bennington and State of Vermont, have invented certain new and useful Improvements in Looping-Machine Attachments for Operating Trimmers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such 1o as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form part .of this specification.

My invention relates to trimming attachments for seaming or looping` machines, and

has for its object to provide means for connecting and operating the trimmer and to remove the strain from the needle-arm; and it consists in the construction hereinafter de- 2o scribed, and more particularly pointed out in the claims.

Heretofore the trimming attachment has been operated by a lever-arm rigidly secured upon a hub or sleeve of the needle-arm, so

that the entire strain of operatin g said attachment was thrown upon the connection between the needle-arm and the driving-cam. In the present instance the lever-arm is loosely mounted upon said hub or sleeve, or, if preferred, upon the journal which carries the needle-arm, so that it is capable of independent movement, and it is operated from an independent connection with the cam-disk.

Referring to the drawings, in which like 3 5 letters of reference represent corresponding parts in each ligure of the drawings, Figure l is a plan view of so much of a looping-machine as is necessary to show the relation of the trimming attachment to the driving-shaft 4o and operating-connections. Fig. 2 is an elevation of the needle-arm, the lever-arm .for operating the trimming attachment, and the actuating-cam, showing the connections between the parts. Fig. 3 is a plan View of the mechanism shown in Fig. 2, and Fig. 4 is a perspective view of the lever-arm and the coupling by which it is connected with the actuating-cam and asection of the cutter-operating arm.

5o A designates the circular holding-plate of p the machine, around which the point-carrying ring a revolves, and B the driving-shaft mounted on the bracket b, from which the machine is driven, power being applied to the shaft through a band-pulley O or other equiva- 5 5 lent means.

D represents a trimming attachment for severing the fabric which formed the subjectmatter of a separate application for Letters Patent of the United States flled by me O11 6o the 16th day of November, 1889, upon which Letters Patent No. 426,244 were granted April 22, 1890, and need not therefore be described here further than to show its construction with the operating mechanism. A circular disk E is mounted eccentrically on the end of the driving-shaft B, and has in its face a groove F, which, by reason of the eccentricity of the disk on the shaft,forms a cam-groove.

G designates the needle-bar, which has at 7o one end an elongated hub or sleeve j, that works upon a rigid spindle J, upon which the said bar swings or vibrates. Toward its outer or swinging end the needle-b ar G has a lateral projection g, which rests againstthe side of a block c', that fits into the grooove F of the disk E, and is held thereon by a pin h. The groove F being eccentric to the shaft B, when the disk E revolves the block 0l moves in the groove, and the needle-bar G is vibrated back 8oand forth as the needle performs its work.

A lever-arm K is loosely mounted on the same spindle J with the needle-bar or on the sleeve or hub j of the latter, as desired. This arm K has outwardly-projecting parallel lugs 7c at its swinging end, between which the end of a lever-arm M is held, which projects from the trimming attachment D, and through which said attachment is operated.

A crank pin or stud H projects from the 9o face of the disk E at its center, which holds one end of a coupling-arm I, while the other end of the arm is pivotally connected at L with the swinging end of the lever-arm K, that is held on the spindle J. The pin H being eccentric to the shaft B, when the shaft and disk rotate the arm K will be vibrated,

and this vibratingmovement will operate the cutting attachment D. 4

As before stated, the arm K has heretofore roo been rigidly mounted on the hub of the bar G and has been operated through the connection between the latter and the disk E,

thus putting a heavy strain upon the pin h. By mounting the arm K loosely, so as to pervmit independent movement, and coupling it with a separate pin on the disk E, the strain incident to the working of the cutters is taken olii` the pin h and the mechanism made more durable and much less liable to get out of repair on account of great wear and consequent breakage of the pin.

Having thus fully described my invention,l

what I claim as new, and desire to secure by Y Letters Patent of the United States, is-

with the needle-bar and having independent movement, the connection between said leverarm and cam-disk being independent of the connection between said disk and the needlebar and of the connection between said leverarm and the trimming attachment, substantially as shown and described.

3. The combination, with a trimming attachment mounted on a holding-plate of the machine, a driving-shaft, and a disk eccentrically mounted on the shaft and having in its face a cam-groove and a crank-pin, of a needle-bar provided with a pin which pro-V jects into the cam-groove, and a lever-arm mounted on a spindle and having right-angled projections connected with the trimming attachment, said lever-arm being connected with the crank-pin of the cam-disk by a coupling, substantially as shown and described.

ln testimony whereof I aiix my signature in presence of two witnesses.

GEO. COOPER.

Witnesses:

D. P. HURLBURT, EDWARD J. HALL.. 

